feat: improved pluginContext

[RohitKushvaha01]

Closes #2804

TOKEN_ALREADY_ISSUED will no longer happen and a valid context is always asigned to plugins regardless of the plugin state

[greptile-apps]

Greptile Summary

The PR moves plugin-context creation into a private application module and establishes a trusted native session before plugin scripts execute.

• Gates token issuance on a securely generated loader session.
• Adds token invalidation and plugin-scoped secret deletion and clearing.
• Restores the omitted getSecret default to an empty string, resolving the previously reported "null" result.
• Removes the globally clobbered Cordova plugin-context module.

Confidence Score: 5/5

The PR appears safe to merge.

No blocking failure remains.

Important Files Changed

Filename	Overview
src/lib/pluginContext.js	Encapsulates the trusted session and plugin token while restoring the empty-string default for missing secrets.
src/lib/loadPlugin.js	Establishes the trusted session before loading plugin scripts and supplies the generated context during initialization.
src/plugins/pluginContext/src/android/Tee.java	Gates token issuance by session, strengthens token generation and comparison, and adds scoped secret-management operations.
src/plugins/pluginContext/plugin.xml	Removes the global JavaScript clobber now that plugin-context access is application-internal.
src/plugins/pluginContext/www/PluginContext.js	Deletes the formerly global bridge wrapper in favor of the internal module.
package-lock.json	Regenerates the dependency lockfile without establishing a blocking dependency regression.

Sequence Diagram

sequenceDiagram
  participant Loader as Plugin loader
  participant Bridge as Cordova bridge
  participant Native as Tee native service
  participant Plugin as Plugin script
  Loader->>Native: establishConnection()
  Native-->>Loader: trusted session
  Loader->>Native: requestToken(session, pluginId, manifest)
  Native-->>Loader: plugin-scoped token
  Loader->>Plugin: initialize with PluginContext
  Plugin->>Native: secret/permission action(token)
  Native-->>Plugin: scoped result

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_{Reviews (3): Last reviewed commit: "." | Re-trigger Greptile}

[RohitKushvaha01]

@greptileai

[RohitKushvaha01]

@greptile