chore(readme): update and add skill (#10067)

Co-authored-by: Hugo Pereira Brito <101209179+HugoPBrito@users.noreply.github.com>

skills/prowler-readme-table/SKILL.md

@@ -0,0 +1,110 @@
+---
+name: prowler-readme-table
+description: >
+  Updates the "Prowler at a Glance" table in README.md with accurate provider statistics.
+  Trigger: When updating README.md provider stats, checks count, services count, compliance frameworks, or categories.
+license: Apache-2.0
+metadata:
+  author: prowler-cloud
+  version: "1.0"
+  scope: [root]
+  auto_invoke:
+    - "Updating README.md provider statistics table"
+    - "Updating checks, services, compliance, or categories count in README.md"
+allowed-tools: Read, Edit, Bash, Glob, Grep
+---
+
+## When to Use
+
+Use this skill when updating the **Prowler at a Glance** table in the root `README.md`. This table tracks the number of checks, services, compliance frameworks, and categories for each supported provider.
+
+## Procedure
+
+### Step 1: Collect Stats via CLI
+
+Run the following command for **each provider** and **each metric**:
+
+```bash
+python3 prowler-cli.py <provider> --list-<metric>
+```
+
+**Providers:** `aws`, `azure`, `gcp`, `kubernetes`, `github`, `m365`, `oraclecloud`, `alibabacloud`, `cloudflare`, `mongodbatlas`, `openstack`, `nhn`
+
+**Metrics:** `checks`, `services`, `compliance`, `categories`
+
+The CLI output ends with a summary line like:
+
+```
+There are 572 available checks.
+There is 1 available Compliance Framework.
+```
+
+Extract the number from the summary line. Note that singular results use "There is" instead of "There are".
+
+### Step 2: Batch Extraction
+
+Use this one-liner to collect all stats at once (handles both singular and plural output):
+
+```bash
+for provider in aws azure gcp kubernetes github m365 oraclecloud alibabacloud cloudflare mongodbatlas openstack nhn; do
+  for metric in checks services compliance categories; do
+    result=$(python3 prowler-cli.py $provider --list-$metric 2>&1 | sed -n 's/.*There \(are\|is\) .*\x1b\[33m\([0-9]*\)\x1b\[0m.*/\2/p')
+    echo "$provider $metric: $result"
+  done
+done
+```
+
+### Step 3: Update the Table
+
+Edit the table in `README.md` (located in the `# Prowler at a Glance` section) with the collected numbers.
+
+**Table format:**
+
+```markdown
+| Provider | Checks | Services | [Compliance Frameworks](...) | [Categories](...) | Support | Interface |
+|---|---|---|---|---|---|---|
+| AWS | 572 | 83 | 41 | 17 | Official | UI, API, CLI |
+```
+
+### Provider Name Mapping
+
+| CLI Provider | Table Display Name |
+|---|---|
+| `aws` | AWS |
+| `azure` | Azure |
+| `gcp` | GCP |
+| `kubernetes` | Kubernetes |
+| `github` | GitHub |
+| `m365` | M365 |
+| `oraclecloud` | OCI |
+| `alibabacloud` | Alibaba Cloud |
+| `cloudflare` | Cloudflare |
+| `mongodbatlas` | MongoDB Atlas |
+| `openstack` | OpenStack |
+| `nhn` | NHN |
+
+### Special Rows (No CLI stats)
+
+These providers delegate to external tools and do NOT use CLI stats:
+
+| Provider | Checks Column | Services | Compliance | Categories |
+|---|---|---|---|---|
+| IaC | `[See trivy docs.](https://trivy.dev/latest/docs/coverage/iac/)` | N/A | N/A | N/A |
+| LLM | `[See promptfoo docs.](https://www.promptfoo.dev/docs/red-team/plugins/)` | N/A | N/A | N/A |
+
+### Support and Interface Columns
+
+- **Support**: `Official` for all providers except `NHN` which is `Unofficial`
+- **Interface**: Most providers use `UI, API, CLI`. Exceptions with `CLI` only: `Cloudflare`, `OpenStack`, `NHN`, `LLM`
+
+## Rules
+
+- **ALWAYS** use the CLI (`python3 prowler-cli.py`) to obtain numbers. Do NOT count files manually.
+- **NEVER** commit changes unless explicitly asked.
+- **NEVER** modify the IaC or LLM rows (they link to external docs).
+- Verify the CLI is working by running one provider first before batch-processing all.
+
+## Resources
+
+- **CLI entry point**: `prowler-cli.py` in the repository root
+- **Table location**: `README.md`, section `# Prowler at a Glance` (around line 100)