Statistics Modal

[1brucben]

This pull request introduces a new in-game statistics tracking and display system for players, along with a refactor of economic terminology from "GDP" to "Industrial Production" throughout the codebase. The statistics feature collects key player metrics over time and adds a UI modal for viewing them. The economic terminology update ensures consistent usage and corrects formulas related to trade and player metrics.

Statistics feature additions:

• Added StatDefinitions.ts and StatsStore.ts to track and compute player statistics over time, including metrics like gold, population, productivity, investments, structures, and technology progress. ([[1]](https://github.com/1brucben/Terratomic/pull/97/files#diff-5baf6266e796f97461a07cab75aa29a1e9671d261d602675edd633ce8eda1adeR1-R210), [[2]](https://github.com/1brucben/Terratomic/pull/97/files#diff-670dde409b528ee3a8ea32a5c1f9a65898a53fa4310b234d81d83e70d383d5a3R1-R112))
• Integrated stats collection into ClientGameRunner, initializing tracking for all available metrics and updating stats on each game tick. ([[1]](https://github.com/1brucben/Terratomic/pull/97/files#diff-b256b0f1505dbe2f408d26fd2bee677538c547700ec1cae2d98a8bee3843f787R243-R260), [[2]](https://github.com/1brucben/Terratomic/pull/97/files#diff-b256b0f1505dbe2f408d26fd2bee677538c547700ec1cae2d98a8bee3843f787R312))
• Added a statistics button to the control panel UI (ControlPanel2) that opens a modal displaying tracked player stats. Ensured the modal is registered and styled the button for accessibility. ([[1]](https://github.com/1brucben/Terratomic/pull/97/files#diff-06e5267ac6d5a923f03363b82774e68eec9c2a741aa355bd887f5085b3fd914bR27), [[2]](https://github.com/1brucben/Terratomic/pull/97/files#diff-06e5267ac6d5a923f03363b82774e68eec9c2a741aa355bd887f5085b3fd914bR969-R999), [[3]](https://github.com/1brucben/Terratomic/pull/97/files#diff-06e5267ac6d5a923f03363b82774e68eec9c2a741aa355bd887f5085b3fd914bR1235-R1248))
• Minor UI adjustments to accommodate the new statistics button and modal, including layout tweaks in index.html and control panel styling. ([[1]](https://github.com/1brucben/Terratomic/pull/97/files#diff-f85ce1576c94e1e36e5c117441a2772114649e1bdf9dacf0478a827db28d46c6L265-R265), [[2]](https://github.com/1brucben/Terratomic/pull/97/files#diff-f85ce1576c94e1e36e5c117441a2772114649e1bdf9dacf0478a827db28d46c6R275), [[3]](https://github.com/1brucben/Terratomic/pull/97/files#diff-06e5267ac6d5a923f03363b82774e68eec9c2a741aa355bd887f5085b3fd914bL1150-R1182))

Economic terminology and trade formula updates:

• Renamed "GDP" to "Industrial Production" in all relevant interfaces, formulas, and comments (Config, Player, PlayerUpdate), and updated trade gravity calculations to use industrial production instead of GDP. ([[1]](https://github.com/1brucben/Terratomic/pull/97/files#diff-2642ba97cfb236b407d471ea067073daf91387e758835b1faa1e52a20a8c743fL128-R129), [[2]](https://github.com/1brucben/Terratomic/pull/97/files#diff-2642ba97cfb236b407d471ea067073daf91387e758835b1faa1e52a20a8c743fL156-R156), [[3]](https://github.com/1brucben/Terratomic/pull/97/files#diff-ee2fcbca50d87cc09d2c7d2667210defe2e3e111239820c89c40283be5385b64L1139-R1140), [[4]](https://github.com/1brucben/Terratomic/pull/97/files#diff-e76c8773aaac0de32060a5c943e0753a9621a629d4925071be31c912bd983dd3L613-R614), [[5]](https://github.com/1brucben/Terratomic/pull/97/files#diff-14aef6956113929162722927cdba9071288ec4f3dc2eac3c539768cc11ca66bbL179-R190), [[6]](https://github.com/1brucben/Terratomic/pull/97/files#diff-aa77a10b69c26dd62bc28408bb3143ee9fb5f14ba19c8632f161a8b64de7ffedL136-R140), [[7]](https://github.com/1brucben/Terratomic/pull/97/files#diff-aa77a10b69c26dd62bc28408bb3143ee9fb5f14ba19c8632f161a8b64de7ffedL160-R167))

These changes collectively add a robust player statistics system and improve clarity around economic metrics in the game.