This patch:
* remove <Type>stone.ruins</Type> from specific `gaia/ruins/` templates, because already defined in generic parent template
* removed <Type>treasure.metal</Type> from `template_gaia_treasure.xml` because all its children define their own <Type>
* remove tooltips from specific `gaia/` templates, because already defined in generic parent template
* standardizes the tooltips of resource tooltips to "[verb] [subtype] for [resources]."
* preceded by "Kill to" if <KillBeforeGather>true</KillBeforeGather>
* treasure tooltip is formulated slightly differently (but similar)
* farm field is already done in D1803
Potential ideas for future patches:
* reduce duplication in flora and geo templates by replacing:
```
template_gaia_flora..xml
template_gaia_flora_bush.xml
template_gaia_flora_bush_berry.xml
template_gaia_flora_tree.xml
template_gaia_flora_tree_fruit.xml
```
with:
```
template_gaia_fruit.xml
template_gaia_ore.xml
template_gaia_ore_small.xml
template_gaia_rock.xml
template_gaia_rock_small.xml
template_gaia_tree.xml
```
* might also want to deprecate `template_gaia_geo.xml` because it has little added value
* merge `template_unit_fauna_herd.xml` with its one and only child,`*_domestic.xml`
* change whale resource type from fish to meat, to be consistent with other fauna, and to allow fishing boats to have different gather rates for fish and whales (requires meat gather animations, though)