Add README note for the optional [watch] installation extra

[sGxOxDs]

Description

I noticed some confusion around the watch feature installation.

I originally installed Graphify using pip in the 0.3.x releases. After upgrading to 0.8.x and switching to the recommended uv installation method, the watch command stopped working and always showed:

PS C:\> graphify watch
error: watchdog not installed. Run: pip install watchdog
PS C:\>

Following the suggested pip install watchdog command did not resolve the issue.

I only discovered the solution after finding issue #178. The watch functionality requires installing the optional extra:

uv tool install "graphifyy[watch]"

It would be helpful to add this information to the README so users know that the watch feature is not included by default and requires the [watch] extra during installation.

This could save users from spending time troubleshooting the watchdog not installed error.

[sGxOxDs]

uv + vscode + github copilot

uv tool install "graphifyy[mcp]"

PS C:\> uv tool list            
graphifyy v0.8.36
- graphify
- graphify-mcp

vscode mcp setting for workspace <PROJECT_PATH>\.vscode\mcp.json

{
	"servers": {
		"graphify-mcp-server": {
			"type": "stdio",
			"command": "graphify-mcp",
			"args": []
		}
	},
	"inputs": []
}

[HerenderKumar]

Hey... I worked on this issue

[HerenderKumar]

PR up: #1879.

[HerenderKumar]

Hi @sGxOxDs , I noticed that the linked issue (#1203) was recently closed. Could you clarify the reason for closing it? This PR is still open and ready to go, so just let me know if we should still merge these changes or if you'd like me to close this PR.

[sGxOxDs]

@HerenderKumar
Oops, sorry.
I mistakenly thought this issue had already been resolved.

So...
Should I wait until the PR is merged, and maybe this issue will be automatically closed?

[HerenderKumar]

No worries! Yes, exactly — the PR has Fixes #1203 in its description, so GitHub will close this issue automatically once the PR is merged (it's already linked under "Development" in the sidebar). Nothing you need to do until then; keeping it open was the right call. Thanks for reopening it!