Better Enchantment system using Runes and a Rune Smith

With all the talk of destroying Villager mechanics, I have a solution: Runes.

• Enchanted books can be found in every place that Armor Trims can be found, also from Librarians.
• Enchanted Books can no longer be directly applied directly to gear, only given to a new Villager called the Rune Smith. Once the Rune Smith has the book, it will offer for sale a Rune with the same Enchantment.
• The Rune Smith will have his own job block, used to install and remove Runes from your gear. No XP costs.
• Runes can be duped just like Armor Trims in the Crafting Table, using the base Rune plus other materials. No XP costs.
• Runes cannot be combined to get higher level, only the Enchanted Books before giving them to the Rune Smith.
• Metal Tools and Armor never break, rather get weaker/less efficient. Wood and Stone tools, including Bows and Crossbows, will still break as usual and cannot be repaired without Mending. If a Stone or Wood tool breaks, installed Runes will be dropped.
• The Grindstone is now used for repairing metal Swords, Axes, Pickaxes, Shovels and Tridents, using nuggets/scraps/ingots/shards of the relating material. No cap on repairs. No XP cost.
• The Smithing Table is now used for repairing Armor, using nuggets/scraps/ingots/shards of the related metal, or leather.
• XP levels are no longer ever consumed, and act solely to reflect your XP level for your current life, only lost on death.
• Mending still works by using dropped XP orbs to repair gear. In this case, no XP goes towards your levels.