feat(motion): add leap/flit.nvim plugins

lua/astrocommunity/motion/leap-nvim/README.md

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+# flit.nvim
+
+**Repository:** https://github.com/ggandor/leap.nvim
+
+:kangaroo: Neovim's answer to the mouse
+
+This also includes [flit.nvim](https://github.com/ggandor/flit.nvim).

lua/astrocommunity/motion/leap-nvim/leap-nvim.lua

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+return {
+  {
+    "ggandor/flit.nvim",
+    keys = function()
+      ---@type LazyKeys[]
+      local ret = {}
+      for _, key in ipairs { "f", "F", "t", "T" } do
+        ret[#ret + 1] = { key, mode = { "n", "x", "o" }, desc = key }
+      end
+      return ret
+    end,
+    opts = { labeled_modes = "nx" },
+    dependencies = {
+      "ggandor/leap.nvim",
+      keys = {
+        { "s", mode = { "n", "x", "o" }, desc = "Leap forward to" },
+        { "S", mode = { "n", "x", "o" }, desc = "Leap backward to" },
+        { "gs", mode = { "n", "x", "o" }, desc = "Leap from windows" },
+      },
+      config = function(_, opts)
+        local leap = require "leap"
+        for k, v in pairs(opts) do
+          leap.opts[k] = v
+        end
+        leap.add_default_mappings(true)
+      end,
+    },
+  },
+}