BiggerReactors Rework

Add battery multiblock and clean up comments Battery

• New battery multiblock built from casing, connected glass, a terminal, energy ports and cells, from 3x3x3 up to 32x32x32 (configurable).
• Each cell stores 3.2 GFE and adds 300 kFE/t to the input limit and 300 kFE/t to the output limit; everything scales linearly with the cell count.
• An assembled battery needs a terminal, at least two energy ports and at least one cell. If every port points the same way on assembly, one is switched.
• Energy ports switch between input and output with a wrench or from their screen.
• Right-clicking any battery block other than a port opens the terminal: charge gauge, last tick's input and output, transfer limit, discharge and charge item slots, player inventory and an armor/offhand tab.
• Every cell keeps its share of the stored energy. A broken cell keeps it as an item (shown in its tooltip) and brings it into the next battery.
• Connected, animated cell textures; connected glass with inner corners.
• Jade shows the battery's total energy with the mod's energy bar.
• Recipes, loot tables, block tags, config section and en_us/pt_br translations.
• Guide: new Battery chapter with blocks, recipes, size limits and a 3D example, plus a game test that assembles that example. Cleanup
• Removed comments referring to other mods.
• Removed date stamps from comments.
• Removed dead, commented-out Forge-era gas handler code from the reactor coolant port, turbine fluid port, heat exchanger fluid port and energy handler wrappers.
• Trimmed redundant comments in the battery code.

Full Changelog: https://github.com/vindocel/BiggerReactors-Rework/compare/v0.1.0-beta.1+1.21.1...v0.1.0+1.21.1