feat: restore chat webview on reload

[abeatrix]

CLOSE #1814

This PR added support for reviving the last opened chat panel (if any) on reload.

Test plan

• Build Cody from this branch
• Open a chat and ask Cody a question
• Reload your editor
• You should see the last opened chat opened in your editor before the reload
• Works with SimpleContext

Update 1

Last panel that was not closed gets disposed before it gets recreated.

Screen.Recording.2023-11-27.at.7.41.42.PM.mov

Update 2

Loom: https://www.loom.com/share/1b7acfa69fff4b708bde8c9f3282bdb3?sid=f89aecb4-4caf-4525-bc56-63b34e5c9369

Last panel that was not closed gets revived properly.

DEMO.-.pull_1918.revive.chat.panel.on.reload.mp4

[toolmantim]

Tested this worked well for me. It does a strange tab size & focus jiggle before it finally loads, but looks like that's just a VS Code quirk?

[abeatrix]

Tested this worked well for me. It does a strange tab size & focus jiggle before it finally loads, but looks like that's just a VS Code quirk?

i was doing it the hacky way, but i just implemented the revive function so the webview is no longer getting disposed and then recreated 😄

Loom: https://www.loom.com/share/1b7acfa69fff4b708bde8c9f3282bdb3?sid=f89aecb4-4caf-4525-bc56-63b34e5c9369

DEMO.-.pull_1918.revive.chat.panel.on.reload.mp4