Allow Old Growth Redwood

Old Growth Redwood Regrowth - makes "big reds" renewable: vanilla Old Growth Redwoods never grow back once cut; this lets them slowly regrow/reseed where there's open space and livable climate. Soil Sampler or /redwoodcheck (Admin only)  show if a spot will grow one; /redwoodgrow (Admin only) grows the nearest planted redwood into a big red.

Config - all at the top of RedwoodRegrowthMod.cs :

<table> <thead> <tr> <th>Lever</th> <th>Default</th> <th>Meaning - change this if you want</th> </tr> </thead> <tbody> <tr> <td>RequiredCanopySpacePerTree</td> <td>60 (26)</td> <td>Open space per tree. Canopy capacity each tree reserves (≈ voxel-columns of clear room overhead). Higher = more empty space between trees / sparser, slower regrowth.</td> </tr> <tr> <td>RequiredFertileGroundPerTree</td> <td>45 (20)</td> <td>Ground space per tree. Same idea for fertile soil footprint. Higher = needs more clear ground.</td> </tr> <tr> <td>SeedingDistance</td> <td>40 (24)</td> <td>How far (blocks) seeds land from a parent tree.</td> </tr> <tr> <td>RegrowthRate</td> <td>0.01 (0.02)</td> <td>Population growth speed. Higher = faster comeback.</td> </tr> <tr> <td>SpreadToNeighborsRate</td> <td>0.0001 (0)</td> <td>How fast it creeps into fully-cleared tiles from survivors.</td> </tr> <tr> <td>SeedingIntervalHours</td> <td>6 (2.5)</td> <td>Hours between seeding attempts. Lower = seeds more often.</td> </tr> <tr> <td>SeedsPerAttempt</td> <td>1 (2)</td> <td>Seedlings flung per attempt.</td> </tr> <tr> <td>AgeFractionToSeed</td> <td>0.7</td> <td>How grown (0-1) a tree must be before it can seed.</td> </tr> <tr> <td>LogYield</td> <td>450–500 (700–800)</td> <td>Logs dropped when harvested.</td> </tr> <tr> <td>EnableRegrowth</td> <td>true</td> <td>false = full vanilla (never regrows).</td> </tr> </tbody> </table>