fix: OAuth login authority for MSA-based orgs (#591)

OAuth login requires special treatment for ADO orgs that are not hosted
under MS tenants.
The mapping for such orgs resolves tenant value as zero GUID
`00000000-0000-0000-0000-000000000000`.
And such orgs require "common" authority for issuing the auth token.

## GitHub issue number

#587

## **Associated Risks**

None

## ✅ **PR Checklist**

- [ ] **I have read the [contribution
guidelines](https://github.com/microsoft/azure-devops-mcp/blob/main/CONTRIBUTING.md)**
- [ ] **I have read the [code of conduct
guidelines](https://github.com/microsoft/azure-devops-mcp/blob/main/CODE_OF_CONDUCT.md)**
- [ ] Title of the pull request is clear and informative.
- [ ] 👌 Code hygiene
- [ ] 🔭 Telemetry added, updated, or N/A
- [ ] 📄 Documentation added, updated, or N/A
- [ ] 🛡️ Automated tests added, or N/A

## 🧪 **How did you test it?**

E2E using VSCode as MCP Client

Added new tool to get wiki page (#542)

Added new tool to fetch wiki page meta data

## GitHub issue number
#537 

## **Associated Risks**

None

## ✅ **PR Checklist**

- [x] **I have read the [contribution
guidelines](https://github.com/microsoft/azure-devops-mcp/blob/main/CONTRIBUTING.md)**
- [x] **I have read the [code of conduct
guidelines](https://github.com/microsoft/azure-devops-mcp/blob/main/CODE_OF_CONDUCT.md)**
- [x] Title of the pull request is clear and informative.
- [x] 👌 Code hygiene
- [x] 🔭 Telemetry added, updated, or N/A
- [x] 📄 Documentation added, updated, or N/A
- [x] 🛡️ Automated tests added, or N/A

## 🧪 **How did you test it?**

Manual testing
Added unit tests and ran

2.1.0

2.0.0

1.3.1

1.3.0

chore: publish 1.2.1 (#342)

new release with recent fixes

chore: publish version bump (#315)

Time to publish new version with recent changes

Release version 1.1.0

Release version 1.0.0